Swine Flu What You Need to Know

Swine Flu: What You Need to Know
Good Hygiene Is Important in Combating the Virus
As U.S. officials warn that the number of swine flu cases in the country are likely to increase, there are a number of steps Americans can do to protect themselves and their children from this virus.(Getty Images)
By HUMA KHAN
April 26, 2009
As U.S. officials warn of the spread in swine flu cases across the country, there are a number of steps Americans can take to protect themselves and their children from this unique virus.
The rapidly spreading swine flu is a new virus that includes combination of swine, bird and human strains. It has taken the lives of 81 people in Mexico, and sickened more than a thousand south of the border.
In the United States, 20 cases have been confirmed thus far -- seven in California, two in Kansas, eight in New York City, one in Ohio and two in Texas.
Simple preventive measures, such as washing hands frequently and avoiding people who are coughing or sneezing, can go a long way toward keeping Americans safe from the virus, which health officials expect is likely to afflict more people.
"There is a role for everyone to play when an outbreak is going on to try and reduce the impact," said Dr. Richard Besser, acting director of the Centers for Disease Control and Prevention (CDC). "At an individual level, it's important people understand how they can prevent respiratory infection. Frequent handwashing [is an] effective way to reduce transmission of diseases."
The World Health Organization declared the unusual virus a "public health emergency of international concern," but fell short of calling it a pandemic.
What is a Pandemic?
A flu virus can reach pandemic status if three conditions are met, according to the World Health Organization.
First, it must be an infection that has newly emerged. Secondly, it has to be able to cause serious illness in humans. And thirdly, it must be able to spread easily from person to person. Infections in this category can often spread beyond their continents of origin -- and potentially around the world.
When a flu virus mutates in such a way that it forms a novel version, it means people typically have little to no protection, because their immune systems have no experience fighting that form of the virus. Flu viruses can spread quickly and potentially cause more severe illness when the population lacks immunity.
Scientists around the globe are working hard to determine the threat level of the current swine virus. Right now, the virus is said to have "pandemic potential" because it is a new virus that can spread from person-to-person.
But if it turns out the virus does not spread easily among people, the threat level will go down. Similarly, if it turns out the virus can spread easily among people, the threat becomes more serious and the virus is more likely to trigger a pandemic.
"The distinction about a pandemic is that you need a distinct virus that human population hasn't seen before. Once it starts to spread, it moves rapidly from country to country and from continent to continent and we don't have that yet," said Dr. William Schaffner, chairman of Preventive Medicine at Vanderbilt University Medical Center in Nashville, Tenn.
He added that it is still too early to use the "P" word just yet.
"I'm still observing this as a variant of seasonal influenza. I don't know if we've seen that kind of [global] spread yet so I'm a little bit cautious. However it's in everyone's mind," he said.
But all pandemics are not equally deadly. Some kill millions more people than normal flu outbreaks, while others are roughly on par with seasonal flu in terms of deaths.
It is not possible to predict a pandemic in advance, so health officials keep a close watch on viruses that have "pandemic potential" -- new viruses that have shown at least some ability to transmit to humans.
The current H5N1 bird flu circulating in Asia is an example of a virus that has pandemic potential, but has not yet caused a pandemic.
Pandemics can vary quite a bit in severity. The 1918 pandemic killed many more Americans than an ordinary flu, while the 1968 version killed about 34,000 people -- about the same number killed each year by seasonal flu, according to CDC statistics.
The world generally experiences at least two flu pandemics each century.
What Does a Public Health Emergency Entail?
Declaring a public health emergency allows states to free up their resources for prevention of the disease in question.
Children wear protective masks near the market where their parents own a store in Mexico City, on...
Children wear protective masks near the market where their parents own a store in Mexico City,kids polo shirts, on April 25, 2009. Mexico is struggling with a new strain of swine flu that has killed 68 and sickened more than 1,000. The World Health Organization declared the outbreak a "public health emergency of international concern."
(Julio Cortez/Houston Chronicle/AP Photo)
That declaration gives the head of the Department of Health and Human Services authority to take rapid measures -- including authorizing contacts and mobilizing the national disaster system -- to respond to the disease, including allowing the use of unapproved drugs.
Scientists have not yet determined the reason why there are reported swine flu deaths in Mexico while cases in the United States have thus far been mild.
The WHO noted that the U.S. cases have all been confirmed by laboratory analysis, while those in Mexico have not all been confirmed as yet. This means that health officials do not know how many people who died in Mexico perished because of the new swine flu virus.
However, the CDC is concerned that because the virus is genetically similar in the United States and Mexico, the United States will see more severe illness as new cases emerge, including some deaths.
What You Need to Know About Swine Flu
What many people do not realize is that the flu is generally a much more serious illness than most people appreciate. Even the "typical" flu season results in 36,000 American deaths each year, according to CDC statistics.
The swine flu is a type of influenza virus usually found in pigs. The most common version is H1N1, and the current virus causing concern is a new variation of that virus. Swine flu does not typically pass to humans directly, but such transmission can occur. The current swine flu virus concerns health experts because it has shown the ability to pass from human to human.
When a person gets the swine flu virus, it takes 48 hours before the infected person actually begins to feel ill.
"It takes time for the virus to get down and start to create an illness. That interval between exposure and onset of illness is called the incubation period. The virus hasn't manigested itself," Schaffner said.
Once a person becomes ill, they can stay that way for anywhere from 48 hours to seven days. So far, in the United States, the cases of swine flu have been mild.
There is no vaccination for the swine flu system. U.S. and WHO officials said they are beginning work on a vaccine, but that could take months to develop.
Two prescription anti-viral drugs -- Tamiflu and Relenza -- have proved effective in combating the swine flu virus in victims in the United States. The Obama administration has released 12.5 million courses of the country's stockpile of 50 million courses of Tamiflu.
Health officials and doctors don't recommend people go to the hospital if they are experiencing flu-like symptoms. Rather, they should contact their doctor.
Doctors recommend getting rest and drinking plenty of fluids, and using Tylenol and Advil, which have proven effective for flu symptoms.
Doctors recommend "self-quarantine" for those inflicted with the influenza, so that it does not spread to others. If children are sick, they should not be sent to school. For adults, they should stay away from their workplaces and maintain as much distance as possible from others. Travel on buses or airplanes is not recommended.
Doctors say it is only natural for flus to spread in places like schools, where there is a lot of interaction.
It is hard to distinguish the symptoms of a swine flu from any other flu.
Schaffner said the one distinction is that the swine flu is not a common cold.
"Common cold has its symtoms from the neck up -- sore throat, stuffy nose and feeling crummy. However influenza tends to make you feel much more ill. You can have a sore throat but then you also get cough and muscle aches and pains," he said.
The Swine Flu Symptoms
Hayden Henshaw, an 18year-old from Cibolo, Texas, who was diagnosed with the swine flu last week, said he felt regular flu symptoms.
"You just get really run down, my skin and my muscles were achy. I had a cough and slightly feverish." he told ABC News.
His father, Patrick and 11-year-old sister, Hannah, also got the flu from him.
"It's just like any other flu but the vaccine doesn't help with this strain," his mother, Robin, told ABC News.
Doctors recommend looking out for symptoms such as a fever of more than 100 degrees, body aches, coughing, a sore throat, respiratory congestion and, in some cases, vomiting and diarrhea.
In the absence of symptoms, officials say people don't have to get tested. If they are experiecing the symptoms, they you should take precaution and stay away from others.
The WHO is developing a profile of the "typical case" of swine flu, but thus far, the symptoms appear to be essentially the same as those for the usual winter flu. The only way to definitively diagnose swine flu is to have laboratory testing done to determine the exact subtype of the virus.
Swine Flu Is Called a Global Threat
The WHO has a six-phase approach for dealing with large outbreaks of viruses. The six threat levels help the organization determine the course of action it needs to take and the kind of guidelines and recommendations it needs to provide to countries.
Phase 1 means no viruses circulating among animals are reported to have caused...